import os
from textwrap import dedent

import pytest
from flask import Flask

from configs.app_config import DifyConfig

EXAMPLE_ENV_FILENAME = '.env'


@pytest.fixture
def example_env_file(tmp_path, monkeypatch) -> str:
    monkeypatch.chdir(tmp_path)
    file_path = tmp_path.joinpath(EXAMPLE_ENV_FILENAME)
    file_path.write_text(dedent(
        """
        CONSOLE_API_URL=https://example.com
        CONSOLE_WEB_URL=https://example.com
        """))
    return str(file_path)


def test_dify_config_undefined_entry(example_env_file):
    # NOTE: See https://github.com/microsoft/pylance-release/issues/6099 for more details about this type error.
    # load dotenv file with pydantic-settings
    config = DifyConfig(_env_file=example_env_file)

    # entries not defined in app settings
    with pytest.raises(TypeError):
        # TypeError: 'AppSettings' object is not subscriptable
        assert config['LOG_LEVEL'] == 'INFO'


def test_dify_config(example_env_file):
    # load dotenv file with pydantic-settings
    config = DifyConfig(_env_file=example_env_file)

    # constant values
    assert config.COMMIT_SHA == ''

    # default values
    assert config.EDITION == 'SELF_HOSTED'
    assert config.API_COMPRESSION_ENABLED is False
    assert config.SENTRY_TRACES_SAMPLE_RATE == 1.0


# NOTE: If there is a `.env` file in your Workspace, this test might not succeed as expected.
# This is due to `pymilvus` loading all the variables from the `.env` file into `os.environ`.
def test_flask_configs(example_env_file):
    flask_app = Flask('app')
    # clear system environment variables
    os.environ.clear()
    flask_app.config.from_mapping(DifyConfig(_env_file=example_env_file).model_dump())  # pyright: ignore
    config = flask_app.config

    # configs read from pydantic-settings
    assert config['LOG_LEVEL'] == 'INFO'
    assert config['COMMIT_SHA'] == ''
    assert config['EDITION'] == 'SELF_HOSTED'
    assert config['API_COMPRESSION_ENABLED'] is False
    assert config['SENTRY_TRACES_SAMPLE_RATE'] == 1.0
    assert config['TESTING'] == False

    # value from env file
    assert config['CONSOLE_API_URL'] == 'https://example.com'
    # fallback to alias choices value as CONSOLE_API_URL
    assert config['FILES_URL'] == 'https://example.com'

    assert config['SQLALCHEMY_DATABASE_URI'] == 'postgresql://postgres:@localhost:5432/dify'
    assert config['SQLALCHEMY_ENGINE_OPTIONS'] == {
        'connect_args': {
            'options': '-c timezone=UTC',
        },
        'max_overflow': 10,
        'pool_pre_ping': False,
        'pool_recycle': 3600,
        'pool_size': 30,
    }

    assert config['CONSOLE_WEB_URL']=='https://example.com'
    assert config['CONSOLE_CORS_ALLOW_ORIGINS']==['https://example.com']
    assert config['WEB_API_CORS_ALLOW_ORIGINS'] == ['*']
